Chair backrest
Description
Claims
The ornamental design for a chair backrest, as shown and described.
Referenced Cited
U.S. Patent Documents
D493627 | August 3, 2004 | Ma |
D534384 | January 2, 2007 | Su |
D540080 | April 10, 2007 | Su |
D540081 | April 10, 2007 | Su |
D540579 | April 17, 2007 | Su |
D540580 | April 17, 2007 | Su |
D543398 | May 29, 2007 | Su |
D559571 | January 15, 2008 | Meda |
D579223 | October 28, 2008 | Greutmann |
D579695 | November 4, 2008 | Wu |
D580198 | November 11, 2008 | Wu |
D580199 | November 11, 2008 | Su |
D582170 | December 9, 2008 | Chi |
D650617 | December 20, 2011 | Chen |
Patent History
Patent number: D661137
Type: Grant
Filed: Nov 16, 2011
Date of Patent: Jun 5, 2012
Inventor: Tung-Hua Su (Tainan)
Primary Examiner: Mimosa De
Application Number: 29/406,633
Type: Grant
Filed: Nov 16, 2011
Date of Patent: Jun 5, 2012
Inventor: Tung-Hua Su (Tainan)
Primary Examiner: Mimosa De
Application Number: 29/406,633
Classifications
Current U.S. Class:
D6/502;
D6/366